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Hollowcore

Hollowcore plank from County Prestress & Precast delivers the structural efficiency, schedule advantages, and design flexibility today’s contractors and developers require. Manufactured in PCI and NPCA-Certified facilities, concrete hollowcore supports longer spans, reduces on‑site labor, and creates open, unobstructed interiors for a wide range of commercial, multifamily, and mixed‑use projects. Available in 8”, 10”, 12”, and 16” depths, hollowcore planks can span up to 45 feet without intermediate columns, maximizing rentable space and accommodating modern, column‑free layouts. Hollowcore floor and roof systems are fully compatible with steel, masonry, cast‑in‑place, or precast wall systems, making them ideal for parking garages, warehouses, and commercial buildings.

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Versatile Hollowcore Solutions

Precast concrete hollowcore supports a wide range of applications with efficient installation, long spans, and reliable performance across commercial, residential, and infrastructure projects.

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Office, Retail & Mixed-Use

Hollowcore supports commercial construction with efficient floor and roof solutions that streamline schedules and reduce on-site labor. Long spans minimize interior columns, creating open, flexible layouts for offices, retail spaces, and mixed-use developments. Off-site production ensures consistent quality and precise tolerances, while pre-installed openings simplify mechanical and electrical integration. Durable concrete construction provides reliable performance, fire resistance, and acoustic separation for multi-level commercial environments.

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Apartments & Condominiums

Hollowcore supports multifamily construction with efficient floor and roof solutions that accelerate schedules and reduce on-site labor. Long spans limit interior columns, creating open, functional layouts across units and shared spaces. Off-site production ensures consistent quality and tight tolerances, while preformed openings simplify mechanical and utility integration. Durable concrete construction enhances fire resistance and provides effective sound separation between units for long-term comfort and performance.

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Warehousing & Distribution

Concrete hollowcore provides durable floor and roof solutions for industrial and warehouse construction, helping accelerate installation and reduce on-site labor. Long spans minimize interior columns, opening space for storage, equipment, and efficient circulation. Off-site production delivers consistent quality and precise tolerances, while integrated openings support mechanical and utility needs. High-strength concrete performs reliably under heavy loads, ensuring long-term durability in demanding environments.

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Data Centers & Support Spaces

Reliable structural performance and fast installation make hollowcore a strong fit for data center construction. Long spans reduce interior columns, allowing flexible layouts for server rooms and support areas. Off-site production ensures consistent quality and precise tolerances, while preformed openings simplify mechanical and electrical coordination. Durable concrete construction supports heavy equipment loads and provides inherent fire resistance and sound control for secure, high-demand environments.

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Benefits of Hollowcore

Hollowcore plank from County Prestress & Precast is a versatile concrete floor and roof system that supports wider spans with fewer columns.

PCI‑Certified Quality Control

PCI‑certified production ensures consistent dimensions, verified performance, and dependable quality that meet industry standards and reduce construction risk.

Custom Sizes for Design Flexibility

Planks are produced in custom lengths and widths up to 48″, supporting unique layouts, structural demands, and project-specific design requirements.

Off-Site Cuts & Penetrations

Openings and custom cuts are completed off-site to reduce field labor, improve installation speed, and deliver tighter tolerances with greater consistency.

High-Strength Concrete Performance

An 8,000 psi dry cast concrete mix delivers durability, structural reliability, and long-term performance for demanding floor and roof systems.

Fire-Rated Safety

Hollowcore plank provides fire ratings up to two hours before assembly and up to three hours after, supporting life safety and code compliance.

Long Spans, Fewer Columns

Clear spans up to 45 feet create open, column-free interiors that maximize usable space and support flexible, modern building layouts.

Made in the USA

Domestic manufacturing supports consistent quality, shorter lead times, and a reliable supply chain, helping keep projects on schedule.

Long Spans, Strength and Structural Efficiency Across Multiple Markets

Precast concrete hollowcore plank delivers efficient installation, longer clear spans, and dependable structural performance, enabling flexible layouts and predictable schedules across a wide range of commercial, multifamily, and mixed‑use projects.

View Commercial Solutions
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Commercial

For commercial projects, hollowcore plank provides structural efficiency, scheduling advantages, and design flexibility for offices, retail, and mixed-use developments. County Prestress & Precast offers a broad range of complementary precast and concrete solutions to support commercial construction with coordinated execution and dependable performance.

View Data Center Solutions
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Data Centers

Hollowcore provides reliable structural performance for data center construction by supporting heavy equipment loads, fast installation, and flexible layouts within data halls and support spaces. County Prestress & Precast offers coordinated precast and concrete solutions to support data center projects with predictable schedules and dependable building performance.

View Industrial Solutions
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Industrial/Warehouses

For industrial and warehouse facilities, hollowcore plank delivers reduced on-site labor, unobstructed interiors, dependable quality, and custom lengths and widths. County Prestress & Precast delivers integrated precast and concrete solutions to support industrial projects with efficient installation and consistent structural performance.

View Multifamily Solutions
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Multifamily

Hollowcore supports multifamily construction by accelerating schedules, reducing on‑site labor, and improving fire resistance and sound separation between levels. County Prestress & Precast provides a comprehensive range of complementary precast and concrete solutions designed to support multifamily developments with coordinated design and reliable long‑term performance.

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Integrated Precast Solutions

Pairing hollowcore with complementary precast components creates an efficient structural approach. Columns and beams manage loads, solid slabs support transitions, wall panels improve enclosure speed, and shafts and podiums streamline circulation and scheduling.

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Faster Installation, Faster Occupancy

Hollowcore speeds construction by shifting work off site and reducing field labor. Ready‑to‑set planks install quickly, longer spans cut structural elements, and immediate load‑bearing capacity limits shoring—supporting faster dry‑in and shorter schedules.

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Acoustical Damping

Hollowcore provides inherent acoustical damping between floors. Dense concrete mass reduces airborne sound, while internal cores limit structure‑borne noise. When combined with toppings, assemblies achieve high STC and IIC ratings for quieter interiors.

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Design Collaboration on Day One

Whether you're starting with a fully detailed plan or just a sketch on the back of a napkin, our expert design and engineering team is ready to help bring your ideas to life. We specialize in working together with architects, engineers, developers, and contractors to develop innovative, efficient, and buildable precast solutions for all types of structures including parking decks, podiums, total precast buildings, and more.

Projects

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This affordable housing development demonstrates how prestressed and precast concrete products from County Prestress & Precast enhance construction efficiency, improve precision, and deliver long-term durability. By accelerating installation and reducing labor-intensive steps, these components helped the city achieve its goals for cost-effective, sustainable housing that lasts.

The Warren Apartments

Minneapolis, MN

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This project demonstrates how County Prestress & Precast’s concrete components accelerate multifamily construction on tight construction sites and in winter conditions. Off-site manufacturing and rapid erection kept the schedule on track, while hollowcore delivered longer spans, acoustic performance, and multi-hour fire resistance to support the residential structure above.

The Retreat at Mendota

Mendota Heights, MN

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This multifamily residential project showcases how precast concrete products accelerate construction while delivering long-term structural reliability. Through performance, installation efficiency, and durable load-bearing capacity, our concrete components support modern residential development in dense commercial corridors.

Golden Triangle

Eden Prairie, MN

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This multifamily project showcases the advantages of precast concrete podiums for residential developments that require speed of installation, durability, and consistent quality. Rapid erection, reliable performance, and an integrated structural system enabled construction activities to progress quickly and set the stage for successful vertical construction.

Orchard Place

Apple Valley, MN

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